ITEM NAME:Mini usb 2.0 microphone portable studio speech mic audio adapter driver S IO FT Noise-cancelling microphone filters out unwanted background noise. Power switch illuminates when microphone is active. Advanced digital USB provides superior clarity with the simplicity of a single USB plug and play connection. Can be used with any computers with USB port, plug and play; automatically shielded built-in sound card microphone of computer ( certain computer will not shield which only manually switch once. Specifications: Working voltage: 4.5V Size: 2cm x 2cm x 0.5cm Color: White Package Included: 1 x USB Microphone Noise-cancelling microphone filters out unwanted background noise. Power switch illuminates when microphone is active. Advanced digital USB provides superior clarity with the simplicity of a single USB plug and play connection. Can be used with any computers with USB port, plug and play; automatically shielded built-in sound card microphone of computer ( certain computer will not shield which only manually switch once. Specifications: Working voltage: 4.5V Size: 2cm x 2cm x 0.5cm Color: White Package Included: 1 x USB Microphone.1 x USB Microphone. Noise-cancelling microphone filters out unwanted background noise. Power switch illuminates when microphone is active. Advanced digital USB provides superior clarity with the simplicity of a single USB plug and play connection.